I/O buffering behavior (2nd attempt)

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

Is possible to clarify how to use function setvbuf in fortran code? Any example will be very useful.

Is possible to increase the buffer size to avoid I/O operations between file and program?

Is possible to change buffer behavior via setvbuf function for scratch files too?

Michal

2

Mat,

could you add any comment to my questions?

Michal

3

Sorry Michal, I’ve never used setvbuf myself so don’t have any insight here. I was hoping another user might step in. No such luck.

Although I’m really busy right now, I’ll try and set aside a hour to write-up and example for you. The the lib3f Fortran setvbuf is just a wrapper for the C system call so it shouldn’t be too hard to pull something together.

  • Mat